bantu ngerjain tugas ya

12. D. We should turn off the tap before leaving.
13. C. In a toilet
14. A. Typed their proposal.
15. C. He takes leave of Arkan.
16. D. Because SMA and SMK will have the national exam.
17. A. Three days (Holiday at 4th, back to school at 7th)
18. C. The students (because the letter is written for the students)

Semoga Bermanfaat :)

Answer:
12.D
13.C
14.A
15.A
16.D
17.A
18.C
Thanks